A device for measuring the oscillation amplitude of the tip of a capillary by means of a light beam comprises a light source and an opto-receiver and two apertured diaphragms that are arranged between the light source and the opto-receiver and which lie on a common axis. The apertured diaphragms are preferably formed by means of drill holes arranged on a common axis in side walls of a channel formed in a body. The two apertured diaphragms define the diameter of the light beam.
Legal claims defining the scope of protection, as filed with the USPTO.
1. Device for measuring an oscillation amplitude of a tip of a capillary, whereby the oscillations of the tip of the capillary modulate an intensity of a light beam, the device comprising a light source, an opto-receiver, and only two apertured diaphragms aligned coaxially to one another and arranged between the light source and the opto-receiver, wherein a diameter of the light beam that is effective for the measurement is the same as a diameter of the apertured diaphragms.
2. Device according to claim 1 , wherein the apertured diaphragms are formed by means of drill holes arranged on a common axis in side walls of a channel formed in a body.
3. Device according to claim 1 , wherein the diameter of the apertured diaphragms amounts to less than 100 μm.
4. Device according to claim 2 , wherein the diameter of the apertured diaphragms amounts to less than 100 μm.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
December 19, 2003
August 23, 2005
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